Synthetic V-Twin Primary Chaincase Fluid

chaincase fluid

Synthetic V-Twin Primary Fluid AMSOIL Synthetic V-Twin Primary Fluid. Purpose-built primary chaincase lubricant for longer component life and increased efficiency.

SKU: MVP Category:

Improved Harley V-Twin Primary Chaincase Oil

Our customers LOVE this product!

Engineered to provide consistent clutch performance for confident starts. Helps prevent slip for smooth acceleration. Limits drag to make finding neutral easy. Protects the compensator bearing and other vital chaincase components for long equipment life. Use in V-twin primary chaincases commonly found in Harley-Davidson,* Triumph* and pre-2013 Indian* motorcycles.

chaincase fluid\

Solves the “Finding, Skipping Neutral Problem”

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Printable Product data sheet for those who tell you this doesn’t exist – Primary chaincase clutch fluid Data Bulletin

AMSOIL V-Twin Synthetic Primary Fluid is purpose-built for bikers who prefer a dedicated primary chaincase lubricant. Its balanced formulation delivers consistent clutch feel for confident takeoffs, helping riders avoid killing the engine. It also protects components against wear to help riders get the most out of their bikes. V-Twin Synthetic Primary Fluid is Warranty Secure™ and will not void your motorcycle’s warranty. It is a cost-effective, high-performance alternative to original equipment manufacturer (OEM) fluids.

Delivers Consistent Clutch Feel & Smooth Acceleration

V-Twin Synthetic Primary Fluid is formulated with a balanced additive system that provides consistent clutch performance and feel. It helps riders easily find neutral and promotes smooth acceleration, whether in stop-and-go city conditions or when on the highway. Its superior load-holding capacity helps prevent clutch slip for confident takeoffs.

Protects Against Chain, Gear & Bearing Wear

V-Twin Synthetic Primary Chaincase Fluid contains a heavy dose of anti-wear additives to protect the gears, chain and compensator bearing from premature wear. Its superior film strength helps protect against shock-loading, promoting reduced wear and longer component life.

Helps Reduce Operating Temperatures

In extreme heat, V-Twin Synthetic Primary Fluid’s thermally stable synthetic formulation naturally resists the harmful effects of thermal breakdown. It helps components stay cool and achieve optimum performance and life.

Maximizes Energy Efficiency

V-Twin Synthetic Primary Fluid’s balanced formulation reduces energy lost to drag in cold-temperature riding conditions. It promotes smooth shifts at startup and maximizes energy efficiency.

  • Delivers consistent clutch feel for confident takeoffs
  • Helps prevent clutch slip
  • Provides smooth acceleration
  • Helps riders easily find neutral
  • Protects compensator bearing, chain and gears against wear


Harley Davidson®, Triumph® and pre-2013 INDIAN® bikes.


V-Twin Synthetic Primary Fluid is recommended for up to 10,000 miles or one year, whichever comes first.

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AMSOIL V-Twin Synthetic Primary Fluid is Warranty Secure, keeping your factory warranty intact. AMSOIL V-Twin Synthetic Primary Fluid is a high-performance replacement for vehicle manufacturer-branded products and is also backed by the AMSOIL Limited Warranty (G1363). For details, visit

Secure for Warranty & OEM use

Secure for Warranty & OEM use





This product is not expected to cause health concerns when used for the intended application and according to the recommendations in the Safety Data Sheet (SDS). An SDS is available via the Internet at or upon request at 715-392-7101. Keep Out of Reach of Children. Recycle used oil and bottle.


Longer Lasting
By  MIKE,  a  Verified Buyer  from  Florida   on  December 29, 2021

When changing the fluid at 5,000 miles oil still has clarity not as dirty as factory oil. Neutral is easier to find and shifts are smoother.
Primary fluid review
By  MARVIN,  a  Verified Buyer  from  Virginia  on  December 27, 2021

All the research I did recommended this fluid over the rest.
Primary fluid
By  KEVIN,  a  Verified Buyer  from  Fort Wayne, in.  on  December 19, 2021

I use Amsoil products in all 3 holes on my 1998 Harley-Davidson road king classic. The bike has a 112,000 miles on it, but still runs and rides beautifully.
Amsoil Harley 3 hole
By  Alan,  a  Verified Buyer  from  SC  on  November 11, 2021

I recently changed my 2015 Harley FLHXS to amsoil in all 3 holes. It’s cooler weather now so I can’t really tell if the engine is running cooler as others have said. I can attest that my transmission shifts better and less clunking when dropping into 1st gear. Either the bike is happier with the amsoil granny lube or the amsoil primary lube. Either way I am very happy with the amsoil products for my bike. Is it possible that lubrication change makes it feel easier to back the bike up? Doesn’t make sense but it sure feels easier to back up.
Amazing results
By  Marty,  a  Verified Buyer  on  October 03, 2021

This stuff is amazing. 100% noticable improvement in shifting and finding neutral. If you hold in on the clutch, crack the throttle, then shift into gear, it slips in without the clunk. Smoother shifts while going down the road, definitely a noticeable improvement in drivability. No disappointments with this
No slip, all grip
By  FABIAN,  a  Verified Buyer  on  September 17, 2021

My mechanic thought clutches might slip, but it did not.
Webmaster note: (Mechanics are often wrong about AMSOIL as it’s a end user product – not a profitable product unless they try it themselves – then we see their tune change).
V-Twin Primary fluid
By  LES,  a  Verified Buyer  from  Colorado  on  September 24, 2021

Like the other two holes I use Amsoil Primary Fluid in the third hole because it helps run the primary quietly and smoothly. I put up to 18,000 – 20,000 miles on my MC every year so its important that I get great protection and longer times between oil changes. I start the riding season with Run For The Wall. The group of veterans rides from California to Washington to honor those names on the Vietnam Memorial Wall and the Middle Eastern Conflicts Wall. That ride puts a motorcycles through some tough weather and miles ( 6800 for me). Amsoil protects my motorcycle and give me confidence I will be able to complete the mission.
Easy to use and smooths shifting.
By  BOB,  a  Verified Buyer  from  Murrells Inlet SC  on  October 01, 2021

Easy on the clutches, love the oil.

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